Efficient environment-friendly antimony-free flame-retardant PVC leather and preparation method thereof

Abstract

The invention relates to efficient environment-friendly antimony-free flame-retardant PVC (polyvinyl chloride) leather which comprises the following components in parts by weight: 100-200 parts of PVC resin, 50-100 parts of a modified plasticizer, 10-20 parts of a surface modified flame retardant, 5-10 parts of a stabilizer and 1-5 parts of an anti-amine agent. By improving the plasticizing degree and modifying the synergistic flame-retardant material, heavy metal pollution is avoided.

Description

Technical Field

[0001] The invention relates to synthetic leather, in particular to PVC leather. Background Art

[0003] Polyurethane synthetic leather has obvious advantages over other synthetic leathers in terms of wear resistance, softness, and leather feel. It is one of the most important synthetic leathers at present and has been widely used in many fields such as automotive interiors, sofas, clothing, luggage, etc.

[0004] The amount of plasticizer used in automotive PVC leather is generally 90PHR~120PHR of the total PVC, but plasticizers are usually flammable lipid molecular structures. With the large amount of plasticizer added, PVC leather is very easy to burn, which cannot meet the physical requirements of high flame retardancy for automotive leather. In order to meet the flame retardant performance of automotive leather, the conventional process in the industry achieves the flame retardant performance of PVC leather by adding a large amount of antimony trioxide (Sb3O2) and decabromodiphenyl ether during the manufacturing process of PVC leather. Antimony is one of the heavy metal pollutants, and it is expensive and produces a large amount of toxic black smoke when burned. Under the background of environmental protection and green, the production and sales of antimony-containing flame-retardant PVC automotive leather will gradually be restricted. The industry urgently needs to develop efficient, environmentally friendly, antimony-free flame-retardant PVC leather that meets the demand. Summary of the invention

[0005] Purpose of the invention: The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a highly efficient, environmentally friendly, antimony-free flame-retardant PVC leather and a preparation method thereof that avoids heavy metal pollution by improving the plasticization degree and modifying the synergistic flame-retardant material.

[0006] Technical solution: In order to solve the above technical problems, the high-efficiency, environmentally friendly, antimony-free, flame-retardant PVC leather of the present invention comprises, by weight, 100-200 parts of PVC resin, 50-100 parts of modified plasticizer, 10-20 parts of surface-modified flame retardant, 5-10 parts of stabilizer, and 1-5 parts of anti-amine agent.

[0007] Furthermore, the stabilizer is a potassium zinc stabilizer, a barium zinc stabilizer or a PVC composite stabilizer.

[0008] Furthermore, the anti-amine agent is perchlorate.

[0009] Furthermore, the surface modified flame retardant is formed by macromolecular bonding, ultrafine and nano surface modification of Al(OH)3, Mg(OH)2 and zinc borate.

[0010] Furthermore, the modified plasticizer is formed by introducing environmentally friendly phosphate polymers through grafting and coupling.

[0011] A method for preparing highly efficient, environmentally friendly, antimony-free, flame-retardant PVC leather comprises the following steps: 1. Preparation of slurry: Stir all raw materials in a high-speed mixer at high speed and then put them into an internal mixer for internal mixing to obtain slurry; 2. Slurry coating: 2.1. Apply the slurry on the release paper and dry it at 100-140℃ for 75-85s; 2.2. Apply the foaming layer slurry on the dried surface layer and dry it at 100-130℃ for 70-80s; 2.3. Apply water-soluble phenolic resin adhesive on the foaming layer as a bonding layer, then bond it to the base fabric and dry it at 80-120℃; 2.4. Use a three-plate printing press to roll-coat one or more layers of surface treatment agent on the dried product, put it into the oven, and dry it at a temperature of 90℃-140℃.

[0012] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention improves the flame retardant properties of PVC leather by increasing the degree of plasticization in the process and reducing the amount of plasticizer used. By increasing the degree of plasticization, the processing temperature is reduced under the same production process conditions, the thermal degradation of PVC is reduced, the physical and mechanical properties of PVC leather are improved, energy saving and efficiency are reduced, and the production and manufacturing costs are reduced. In addition, the material cost is reduced by reducing the amount of plasticizer used. At the same time, the plasticizer in the existing formula system is modified, and environmentally friendly phosphate polymers are introduced through grafting and coupling. At the same time, Al(OH)3, Mg(OH)2, zinc borate, etc. are surface modified, macromolecularly bonded, ultra-fine and nano-improved by a modification process to improve their synergistic flame retardant properties, solve the problem of heavy metal oxide precipitation of traditional antimony trioxide flame retardant in the PVC leather manufacturing process and subsequent use process, and avoid heavy metal pollution. The present invention can reduce manufacturing energy consumption by more than 10%, and at the same time reduce unit material cost by nearly 30%. DETAILED DESCRIPTION

[0013] The present invention will be further described below in conjunction with the embodiments. Example 1

[0014] The high-efficiency, environment-friendly, antimony-free, flame-retardant PVC leather of the present invention comprises, by weight, 180 parts of PVC resin, 85 parts of modified plasticizer, 17 parts of surface-modified flame retardant, 8 parts of stabilizer, and 3 parts of anti-amine agent.

[0015] The stabilizer is a potassium zinc stabilizer.

[0016] The antiamine agent is perchlorate.

[0017] The surface modified flame retardant is obtained by macromolecular bonding, ultrafine and nano surface modification of Al(OH)3, Mg(OH)2 and zinc borate.

[0018] The modified plasticizer is formed by introducing environmentally friendly phosphate polymers through grafting and coupling.

[0019] A method for preparing highly efficient, environmentally friendly, antimony-free, flame-retardant PVC leather comprises the following steps: 1. Preparation of slurry: Stir all raw materials in a high-speed mixer at high speed and then put them into an internal mixer for internal mixing to obtain slurry; 2. Slurry coating: 2.1. Apply the slurry on the release paper and dry it at 138℃ for 80s; 2.2. Apply the foaming layer slurry on the dried surface layer and dry it at 125℃ for 75s; 2.3. Apply water-soluble phenolic resin adhesive on the foaming layer as a bonding layer, then bond it to the base fabric and dry it at 115°C; 2.4. Use a three-plate printing press to roll-coat one or more layers of surface treatment agent on the dried product, put it into the oven, and dry it at 130°C. Example 2

[0020] The high-efficiency, environment-friendly, antimony-free, flame-retardant PVC leather of the present invention comprises, by weight, 170 parts of PVC resin, 75 parts of modified plasticizer, 16 parts of surface-modified flame retardant, 7 parts of stabilizer, and 2 parts of anti-amine agent.

[0021] The stabilizer is a barium zinc stabilizer.

[0022] The antiamine agent is perchlorate.

[0023] The surface modified flame retardant is obtained by macromolecular bonding, ultrafine and nano surface modification of Al(OH)3, Mg(OH)2 and zinc borate.

[0024] The modified plasticizer is formed by introducing environmentally friendly phosphate polymers through grafting and coupling.

[0025] A method for preparing highly efficient, environmentally friendly, antimony-free, flame-retardant PVC leather comprises the following steps: 1. Preparation of slurry: Stir all raw materials in a high-speed mixer at high speed and then put them into an internal mixer for internal mixing to obtain slurry; 2. Slurry coating: 2.1. Apply the slurry on the release paper and dry at 136℃ for 82s; 2.2. Apply the foaming layer slurry on the dried surface layer and dry it at 120℃ for 77s; 2.3. Apply water-soluble phenolic resin adhesive on the foaming layer as a bonding layer, then bond it to the base fabric and dry it at 110°C; 2.4. Use a three-plate printing press to roll-coat one or more layers of surface treatment agent on the dried product, put it into the oven, and dry it at 120°C. Example 3

[0026] The high-efficiency, environment-friendly, antimony-free, flame-retardant PVC leather of the present invention comprises, by weight, 160 parts of PVC resin, 70 parts of modified plasticizer, 15 parts of surface-modified flame retardant, 6 parts of stabilizer, and 1.5 parts of anti-amine agent.

[0027] The stabilizer is a PVC composite stabilizer.

[0028] The antiamine agent is perchlorate.

[0029] The surface modified flame retardant is obtained by macromolecular bonding, ultrafine and nano surface modification of Al(OH)3, Mg(OH)2 and zinc borate.

[0030] The modified plasticizer is formed by introducing environmentally friendly phosphate polymers through grafting and coupling.

[0031] A method for preparing highly efficient, environmentally friendly, antimony-free, flame-retardant PVC leather comprises the following steps: 1. Preparation of slurry: Stir all raw materials in a high-speed mixer at high speed and then put them into an internal mixer for internal mixing to obtain slurry; 2. Slurry coating: 2.1. Coat the slurry on the release paper and dry at 135℃ for 84s; 2.2. Apply the foaming layer slurry on the dried surface layer and dry it at 118℃ for 79s; 2.3. Apply water-soluble phenolic resin adhesive on the foaming layer as a bonding layer, then bond it to the base fabric and dry it at 112°C; 2.4. Use a three-plate printing press to roll-coat one or more layers of surface treatment agent on the dried product, put it into the oven, and dry it at 125°C.

[0032] The present invention improves the flame retardant properties of PVC leather by increasing the degree of plasticization in the process and reducing the amount of plasticizer used, and by increasing the degree of plasticization, the processing temperature is reduced under the same production process conditions, the thermal degradation of PVC is reduced, the physical and mechanical properties of PVC leather are improved, energy saving and efficiency are reduced, and the production and manufacturing costs are reduced, and the material cost is reduced by reducing the amount of plasticizer used; at the same time, the plasticizer in the existing formula system is modified, and environmentally friendly phosphate polymers are introduced by grafting and coupling, and at the same time, Al(OH)3, Mg(OH)2, zinc borate, etc. are surface modified, macromolecularly bonded, ultra-fine and nano-improved by a modification process, so as to improve their synergistic flame retardant properties, solve the problem of heavy metal oxide precipitation of traditional antimony trioxide flame retardant in the PVC leather manufacturing process and subsequent use process, and avoid heavy metal pollution. The present invention can reduce manufacturing energy consumption by more than 10%, and at the same time reduce unit material cost by nearly 30%.

[0033] The present invention provides a thought and method. There are many methods and ways to implement the technical solution. The above is only the preferred implementation mode of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention. All components not specified in this embodiment can be implemented by existing technologies.

Claims

1. Highly efficient, environmentally friendly, antimony-free, flame-retardant PVC leather, characterized by: Calculated by weight, it comprises 100-200 parts of PVC resin, 50-100 parts of modified plasticizer, 10-20 parts of surface modified flame retardant, 5-10 parts of stabilizer and 1-5 parts of anti-amine agent.

2. The high-efficiency, environmentally friendly, antimony-free, flame-retardant PVC leather according to claim 1, characterized in that: The stabilizer is a potassium zinc stabilizer, a barium zinc stabilizer or a PVC composite stabilizer.

3. The high-efficiency, environmentally friendly, antimony-free, flame-retardant PVC leather according to claim 1, characterized in that: The antiamine agent is perchlorate.

4. The high-efficiency, environmentally friendly, antimony-free, flame-retardant PVC leather according to claim 1, characterized in that: The surface modified flame retardant is obtained by macromolecular bonding, ultrafine and nano surface modification of Al(OH)3, Mg(OH)2 and zinc borate.

5. The high-efficiency, environmentally friendly, antimony-free, flame-retardant PVC leather according to claim 1, characterized in that: The modified plasticizer is formed by introducing environmentally friendly phosphate polymers through grafting and coupling.

6. A method for preparing the highly efficient, environmentally friendly, antimony-free, flame-retardant PVC leather according to claim 1, characterized in that: It includes the following steps, 1. Preparation of slurry: Stir all raw materials in a high-speed mixer at high speed and then put them into an internal mixer for internal mixing to obtain slurry; 2. Slurry coating: 2.

1. Apply the slurry on the release paper and dry it at 100-140℃ for 75-85s; 2.

2. Apply the foaming layer slurry on the dried surface layer and dry it at 100-130℃ for 70-80s; 2.

3. Apply water-soluble phenolic resin adhesive on the foaming layer as a bonding layer, then bond it to the base fabric and dry it at 80-120℃; 2.

4. Use a three-plate printing press to roll-coat one or more layers of surface treatment agent on the dried product, put it into the oven, and dry it at a temperature of 90℃-140℃.